70 lines
1.8 KiB
Go
70 lines
1.8 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: BUSL-1.1
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package config
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import (
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"github.com/hashicorp/hcl/v2"
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"github.com/zclconf/go-cty/cty"
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"github.com/zclconf/go-cty/cty/function"
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"github.com/zclconf/go-cty/cty/gocty"
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"github.com/hashicorp/vagrant/internal/config/funcs"
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)
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// EvalContext returns the common eval context to use for parsing all
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// configurations. This should always be available for all config types.
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//
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// The pwd param is the directory to use as a working directory
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// for determining things like relative paths. This should be considered
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// the pwd over the actual process pwd.
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func EvalContext(parent *hcl.EvalContext, pwd string) *hcl.EvalContext {
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// NewChild works even with parent == nil so this is valid
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result := parent.NewChild()
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// Start with our HCL stdlib
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result.Functions = funcs.Stdlib()
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// add functions to our context
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addFuncs := func(fs map[string]function.Function) {
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for k, v := range fs {
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result.Functions[k] = v
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}
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}
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// Add some of our functions
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addFuncs(funcs.VCSGitFuncs(pwd))
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addFuncs(funcs.Filesystem(pwd))
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addFuncs(funcs.Encoding())
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return result
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}
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// appendContext makes child a child of parent and returns the new context.
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// If child is nil this returns parent.
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func appendContext(parent, child *hcl.EvalContext) *hcl.EvalContext {
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if child == nil {
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return parent
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}
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newChild := parent.NewChild()
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newChild.Variables = child.Variables
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newChild.Functions = child.Functions
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return newChild
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}
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// addPathValue adds the "path" variable to the context.
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func addPathValue(ctx *hcl.EvalContext, v map[string]string) {
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value, err := gocty.ToCtyValue(v, cty.Map(cty.String))
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if err != nil {
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// map[string]string conversion should never fail
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panic(err)
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}
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if ctx.Variables == nil {
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ctx.Variables = map[string]cty.Value{}
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}
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ctx.Variables["path"] = value
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}
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